Boiler



F.,B. HOWELL.

Bones. I

APPLICATION FILED OCT. 23,19I4- RENEWED MAR. 8, 1921.

1,393,622o Patented Octa 1].,v H2L HEETS-SHEETL FRA/W( B. HOM/E L L F a. HOWELL.

BOILER. APPLICATION FILED OCT. 23,1914. RENEWED MAR. 8, I|92- 1,393p6220 Patented 0st., 11, 192L 7 'SHEETS--SHEET 2. v l M /'j l,/

I 24 zal F. B. HOWELL.

BOILER.

APPLICATION FILED ocT. 23. 1914.. IIEIII-iwin MAR. s. I92Is n L m Wa 9 W 1.. Md 9 00 4 5 ww H Z, w

7 SHEETS-SHEET 3.

Patented Oct F. B. HOWELL.

BolLER. APPLICATION FILED OCT. 23, 1914. RENEWED MAR. 8, i921.

1,393,622. Patented Oct. 1 1, 192i.

7 SHEETS-SHEET 4.

F. B. HOWELL.

BOILER.

APPLICATION FILED om. 23. 1914.

RENEWED MAR. 8,1921.

Patentd 0st. 1 1, w21.

7 SHEETS-SHEET 5.

\NNI

F. B. HDWELL.v

BOILER. I

. APPLICATION FILED OCT. 23,1914. RENEWED MAR. 8,1921. Lggggh atented 001:. 11, i921.

. 7 SHEETS-SHEET 17g/4 F. B. HOWELL BOILER.

APPLICATION FILED OCT. 23,1914. RENEWED MAR. 8,1921.

143939622, Patented Oct. 11, 1921.

Mve l Inde/775" @www FRA/w( 5. H0 WEL L PTENF OFFICE.

FRANK B. HOWELL, 0F BUFFALO, NEW YORK, ASSIGNOR T0 AMERICAN RADIATOR COMPANY, OF CHICAGO,

ILLINOIS,

A CORPORATION 0F NEW JERSEY.

Bonnin.

Application led October 23, 1914, Serial No. 868,193. Renewed March 8,

To all whom t may concern.'

Be it known that l, F RANK B. HoWELL, a citizen of the United States, residin at the city of Buffalo, Erie county, in the tate of New York, have invented certain newv and useful Improvements in Boilers,y of which the following is a full, clear, and exact specification.

My invention relates to improvements in boilers and the same has for its object more particularly to provide a sectional boiler for use in connection with heating systems which is adapted to burn bituminous or other soft fuel economically and smokelessly, and require only infrequent attention.

Further, said invention has for its object to provide a boiler having a fuel chamber or receptacle so constructed and arranged that the fuel will not bridge therein andl thereby` cause an unnecessary loss of heat or the dying down of the fire.

Further, said invention has for its object to` provide a boiler having a fuel receptacle in which the fuel is supported in a vertical column which column is thick or of relatively large cross-sectional area at its intermediate portion or burning zone through which the draft gradually tapers toward its upper and lower ends, in order to allow for the swelling or expansion of the fuel which begins just lbefore the fuel4 enters the burning zone, and to allow for the shrinkage in the volume of the mass as the fuel is reduced to ash after passing through the burning zone, and to cause said ash to serve as aproper support for the fuel iwhile passing downwardly through the burning zone.

Further, said invention has for its object to provide a boiler in which a part of the vertically .supported column of fuel is maintained in a burningfzone which is constant and unvarying in extent or volume and thus produces no change in the degree of draft.

Further, Said invention hasfor its object to provide al boiler having an auxiliary air supply device which is so constructed and arranged that the exact volume of air ma be' supplied to the gases liberated from the fuel, and the said air VS0 admitted to the Specification of Letters Patent.

passes crosswise, and then Patented Oct. 11, 1921.

1921. serial No. 450,672.

combustion chamber be heated to the proper degree to insure the immediate ignition of the combustible gases as they are liberated from the burning mass of fuel.

To the attainment of the aforesaid ob* jects and ends my invention consists in the novel details of construction, and in the combination, connection and arrangement of parts hereinafter more fully described and then pointed out in the claims.

In the accompanying drawings wherein like numerals of reference indicate like parts,

Figure 1 is a front elevation showing one form of -boiler embodying my said invention ;v

Fig. 2 is a side elevation viewed from the left hand side in Fig. l;

Fig. 3 is a vertical section, 0n an enlarged scale, through one of the lues or draft passages and the fuel receptacle on line 3 3, Fig. 4;

Fig. 4 is a fragmentary horizontal section on line 4 4, Fig. 3.

Fig. 5 is a vertical section transverse to the Hues on line 5,-5, Fig. 3.

Fig. 6 is a vertical sectionof the exit front elevation of one of the intermediate front sections.

Fig. 10 is a vertical section of the up er portions of several front sections on line 10-10, Fig. a. y

Fig. 11 is a similar View of the lower portions of several front sections on line 11-11, i 3..

Fig. 12 is a vertical section through the water spaces of an intermediate front and an intermediate rear section on line 12--12, Fig. 4f, but on the smallerscale of Figs. l and 2.

,Fig 13 is a similar section through the water space of'one of the end sections on line l3-13, Fig.

Fig. ld is a horizontal section on line it-1a, Fig. a.

Fig. 15 is a fragmentary elevation, partly in section, of a modiied Construction of the air inlet chamber.

Fig. 16 is a horizontal section on line 1ra-1G, rig. 15.

Fig. 17 is a horizontal section of one end of the boiler, showing a modified construcf tion of the secondary air supply devices.

Fig. 17 a is a fragmentary end elevation of the construction shown in Fig. 17.

Fig. 17" is a fragmentary vertical section on line 17", 17", Fig. 17.

Fig. 18 is a fragmentary horizontal section, showing another modified construction of the secondary air supply devices.

Fig. 18L is an end elevation of the same, partly in section. I

The boiler represented in these drawings comprises end sections V20, 21, intermediate front sections 22 which are shallow in the direction of the draft or lengthwise of the boiler, and deep intermediate rear sections 23 which are so arranged with reference' to 'the front sections that a fuel receptacle 24 extending from one end section to the other is formed between the front and rear sections. i

Fach end section is hollow and forms an i .end wall for the boiler which extends from the front to the rear thereof. The upper portions 25 of the end sections, the upper portions 26 of the front sections, and the upper portions 2 7 of the rear sections are so wide that these portions bear with their facing ribs or surfaces against each other and form a practically tight closure between the sections, Figs. 5, 6 and 10. The upper portions ofthe end sections and of the rear sections are provided with relatively large communicating openings 28 in which are arranged nipples 29, Fig.v 5, tapering from the middle toward both ends, whereby the internal spaces or cavities of adjacent sections are tightly connected. The upper portions 26 of the front sections are similarly connected by nipples 30, Fig. 10.

The lower portions 31 of the end sections, the lower portions 32 of the front sections, and the lower portions 33 of the rear sections are as wide as the top portions of these sections so that the sections contact with each other at their upper and lower portions. lThe lower portions of the front sections are connected by nipples 34, Fig. 11, and the lower portions of the rear sections are connected by nipples 35, Fig. 5.

Between the contacting upper and lower portions the end and rear sections are conu tracted so as toleaveiiues or heating passages between them., and the contact between the contracted portions of the sections is effected by means of spacing ribs or fins which project sidewise from the walls of the water spaces of the sections and bear against each other, their faces being dressed or planed to make close contact. These COIL tacting ribs or fins are arranged insuch manner as to direct the dame and hot gases through the spaces between thenarrow or contracted portions of these sections in the desired manner. l

rEhe front sections 22 and the front portions of the end Sections are provided at their sides with rearwardly sloping or des cending ribs or fins 36 and 37, which ribs need not all contact with each other, Figs. 3, 4, 8 and 9. As shown, only the ribs 36 make contact with each other. The spaces between these ribs form an upright series ofy air passages 38 at the front of the fuel receptacle through which the air for the support of combustion enters the column of fuel at' the front.

The rear wall- 39 of the lower portion of each front section preferably slopes or descends rearwardly, Figs. 3, 8 and 12, and the front wall of each rear section also slopes or recedes rearwardly. Fach rear section is provided at the front with Contact ribs 40 which extend from. the enlarged top portion of each section downwardly along both sides of the contracted portion thereof to a point which is approximately at the height or level of the most intense combustion in the fuel receptacle. secondary or supplemental air inlet passage 41 extends transversely through the boiler at this point in rear of the fuel receptacle for the purpose of delivering an additional supply of heated air to the flame and combustible gases issu ing from the receptacle.

This air inlet passage is preferably tubular and comprises as shown in Figs. 3, 4, 5, 7, 12, 13 and. 16, contact collars 42Jforrned on the section, nipples 43 arranged within thesel collars and connecting the sectibns, and a tube 44 extending through all of the sections and nipples and open at one or both ends for the admission of air. rllhe collars, nipples and tube are provided with segmental slots 45 or other suitable openings through which the air issues into the flues between the coni'4 tracted portions of the rear sections. The admission of air to this tube may be regulated by any suitable means, for instance, by pivoted dampers 59, Figs. 2, 4 and 14.

The contracted portions of the rear sections are provided at their sides below the secondary air inlet with contacting fins or ribs 46, 47, 48, Figs. 3, 4 and 5which ex tend upwardly and rearwardly .from the front of the rear sections. These ribs confine the fuel and ashes in-the'lower portion of the fuel receptacle and directV the fiame and hot gases upwardly and rearwardly, as indicated by the arrows. The upper portions of the rearmost ribs 48 are arranged vertically and form bridges or baHies over which the hot gases pass and behind which they descend to the lower portions of the Hue spaces which are ciosed :at the rear Side ceptacle is not intended to, and in view of the rate of combustion of fuel therein, does not serve as a magazine in the sense that such term is ordinarily used in boilers. Ylfhe entire receptacle is only intended to receive and hold sufficient fuel to carry the same from one period of attention to the succeed ing period and is not intended to receive a reserve supply of fuel which is to be shaken down at each period of attention.

ln this application no claim has been made for the secondary air supply, as the same forms the subject-matter of a divisional application filed September 10th, 1921, Serial No. 499,664.

Having thus described my said invention what l claim and desire to secure by Letters Patent is 2- y l. ln a boiler, grateless fuel receptacle having an unobstructed discharge outlet, and an ash pit positioned below said receptacle and communicating with said discharge outlet; said fuel receptacle comprising a burning portion of substantially uniform cross-sectional. area, and a downwardly-tapering ash portion communicating with said burning portion and with said ash pit whereby to provide a constant volume of ash for supporting the fuel in said receptacle during the process of transmutation thereof into ash, and means for providing a draft transversely through the burning portion of said receptacle, substantially as specified.

2. ,ln a boiler, a grateless fuel receptacle having an unobstructed discharge outlet, and an ash pit positioned below said receptacle and communicating with said discharge outlet; said fuel yreceptacle comprising a downwardlyflaring green fuel portion, a burning portion of substantially uniform cross-sectional area and a downwardly-tapering ash portion communicating with said burning portion and with said ash pit whereby to' provide a? constant volume of ash for supporting the fuel in said receptacle during the process of transmutation 'thereof into ash, and means for providing a draft transaaoaeaa versely through the burning 'portion of said receptacle, substantially as specified.

3. ln a boiler, a grateless fuel receptacle having an unobstructed discharge outlet,

and an ash pit positioned below said receptacle and communicating with said discharge outlet; said fuel receptacle having walls entirely surrounding the fuel within said receptacle and extending throughout the height thereof, and comprising a burning portion of substantially uniform crosssectional area, and a downwardly-tapering ash portion communicating with said burning portion and with said ash pit 'whereby to provide a constant volume of ash for supporting the fuel in said receptacle during the process of transmutation thereof into ash, and means for providing a draft transversely through the burning portion of said receptacle, substantially as specified.

4. ln a boiler, a grateless fuel receptacle having an unobstructed discharge outlet, and an ash pit ppsitionedbelow said receptacle and communicating with said discharge outlet; said fuel receptacle havingwalls entirely surrounding the fuel within said receptacle and extending continuously throughout the height thereof, and comprising a downwardly flaring green fuel portion, a burning portion of slbmantially uniform cross-sectional area, and a downwardly-tapering ash portion communicating with said burning portion and with said ash pit whereby to provide` a constant volume of ash for supporting the fuel in said receptacle during the process of transmutation thereof into ash, and means for providing a Vdraft vvtransversely through the burning portion of said receptacle, substantially asA specified.`

Signed at the city of Bualo, Erie county, in the State of New York, this 17th day of September, one thousand nine hundred and fourteen.

FRANK B. HWELL. Witnesses:

A. MERTzANorr, BENJAMIN Rar. 

